Activated carbon biological filter

Abstract

The utility model discloses an activated carbon biological filter, and belongs to the technical field of wastewater treatment. The activated carbon biological filter comprises a filter body, an activated carbon filler layer, a water inlet pipe, a water outlet pipe, an aeration pipe, a backwashing water pipe, a backwashing air pipe and a backwashing drainage pipe, and the activated carbon filler layer is arranged in the filter body in the horizontal direction so as to divide the filter body into a first space and a second space from top to bottom; the water inlet end of the water outlet pipe and the water inlet end of the backwashing drainage pipe are arranged in the first space, and the water outlet end of the water inlet pipe, the air outlet end of the aeration pipe, the water outlet end of the backwashing water pipe and the air outlet end of the backwashing air pipe are arranged in the second space; wherein the height of the water inlet end of the backwashing drain pipe is lower than that of the water inlet end of the water outlet pipe. The water inlet pipe of the backwash drain pipe is lower than the water inlet end of the water outlet pipe, so that waste of water sources in the backwash process is reduced, and the backwash efficiency is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of wastewater treatment, and in particular relates to an activated carbon biofilter. Background Art

[0002] The activated carbon biofilter has the function of removing SS, CODCr, and BOD5. Its biggest feature is that it integrates biological oxidation and interception of suspended solids, which saves the subsequent secondary sedimentation tank and simplifies the treatment process while ensuring the treatment effect. However, since a large number of microorganisms grow on the rough and porous interior and surface of the granular filler, it is necessary to backwash the filler layer to ensure the microorganism's ability to treat wastewater. However, the general activated carbon biofilter has the problem of low backwashing efficiency and waste of backwashing water. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes an activated carbon biofilter to reduce the waste of water during backwashing and improve the backwashing efficiency.

[0004] In a first aspect, the present application provides an activated carbon biofilter, comprising a tank body, an activated carbon filler layer, an inlet pipe, an outlet pipe, an aeration pipe, a backwash water pipe, a backwash air pipe, and a backwash drain pipe, wherein the activated carbon filler layer is arranged in the tank body along a horizontal direction to divide the tank body into a first space and a second space from top to bottom, the water inlet end of the outlet pipe and the water inlet end of the backwash drain pipe are arranged in the first space, the water outlet end of the inlet pipe, the air outlet end of the aeration pipe, the water outlet end of the backwash water pipe, and the air outlet end of the backwash air pipe are arranged in the second space; wherein the height of the water inlet end of the backwash drain pipe is lower than the height of the water inlet end of the outlet pipe.

[0005] According to the activated carbon biofilter tank of the present application, backwash gas and water are filled into the tank body through the backwash air pipe and the backwash water pipe to backwash the activated carbon filler layer, and the backwash drain pipe discharges the sewage generated during the backwashing process. By setting the height of the water inlet end of the backwash drain pipe to be lower than the height of the water inlet end of the outlet pipe so that the water inlet end of the backwash drain pipe is closer to the activated carbon filler layer, the sewage can be discharged at a faster rate, and the water consumption during the backwashing process is reduced, thereby saving water.

[0006] According to an embodiment of the present application, the backwash drain pipe is arranged to penetrate the side wall of the pool body, and the backwash drain pipe is arranged to be inclined upward in a direction away from the pool body.

[0007] According to one embodiment of the present application, the distance L between the water inlet end of the backwash drain pipe and the activated carbon filler layer satisfies:

[0008] 100mm≤L≤250mm.

[0009] According to one embodiment of the present application, it also includes a gas distributor, which is arranged on the lower side of the activated carbon filler layer, and the air inlet end of the gas distributor is connected to the air outlet end of the aeration pipe. The gas distributor includes a plurality of dispersion ports distributed in a horizontal direction, and the gas distributor is used to evenly disperse the gas in the aeration pipe to the plurality of dispersion ports for discharge.

[0010] According to an embodiment of the present application, the upper end of the pool body is open, and the water inlet pipe, the water outlet pipe and the aeration pipe are all extended from the upper end of the pool body into the pool body.

[0011] According to one embodiment of the present application, the activated carbon biofilter tank further includes a drain pipe, which is arranged to penetrate the bottom wall of the tank body, the inlet of the drain pipe is located at the lower end of the second space, and a drain valve is provided on the drain pipe.

[0012] According to one embodiment of the present application, the backwash water pipe and the backwash air pipe are both arranged to penetrate the bottom wall of the pool body, the water outlet end of the backwash water pipe is located at the bottom of the second space, and the air outlet end of the backwash air pipe is located at the bottom of the second space.

[0013] According to an embodiment of the present application, the inner side wall of the cell body is provided with a support portion extending inwardly in a horizontal direction, and the activated carbon filler layer is supported on the support portion.

[0014] According to one embodiment of the present application, the water inlet pipe is provided with a water inlet valve; and / or, the water outlet pipe is provided with a water outlet valve; and / or, the aeration pipe is provided with an aeration valve; and / or, the backwash water pipe is provided with a backwash water valve; and / or, the backwash air pipe is provided with a backwash air valve; and / or, the backwash drain pipe is provided with a backwash drain valve.

[0015] According to one embodiment of the present application, the air inlet end of the aeration pipe is connected to an aeration fan; and / or, the water inlet end of the backwash water pipe is connected to a backwash water pump; and / or, the air inlet end of the backwash air pipe is connected to a backwash fan.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1It is one of the structural schematic diagrams of the activated carbon biofilter provided in the embodiments of the present application.

[0019] Reference numerals:

[0020] 1. Activated carbon biofilter; 11. Tank body; 111. First space; 112. Second space; 12. Activated carbon filler layer; 13. Water inlet pipe; 131. Water inlet valve; 14. Water outlet pipe; 141. Water outlet valve; 15. Aeration pipe; 151. Aeration valve; 152. Aeration fan; 16. Backwash water pipe; 161. Backwash water valve; 162. Backwash water pump; 17. Backwash air pipe; 171. Backwash air valve; 172. Backwash fan; 18. Backwash drain pipe; 181. Backwash drain valve; 19. Sewage pipe; 191. Sewage valve; 20. Gas distributor; 201. Dispersion port. DETAILED DESCRIPTION

[0021] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0022] Reference below Figure 1 An activated carbon biofilter according to an embodiment of the present application is described.

[0023] like Figure 1 As shown, the activated carbon biofilter 1 includes a tank body 11, an activated carbon filler layer 12, a water inlet pipe 13, a water outlet pipe 14, an aeration pipe 15, a backwash water pipe 16, a backwash air pipe 17, and a backwash drain pipe 18.

[0024] The activated carbon filler layer 12 is arranged in the pool body 11 along the horizontal direction to divide the pool body 11 into a first space 111 and a second space 112 from top to bottom. The water inlet end of the outlet pipe 14 and the water inlet end of the backwash drain pipe 18 are arranged in the first space 111, and the water outlet end of the inlet pipe 13, the air outlet end of the aeration pipe 15, the water outlet end of the backwash water pipe 16 and the air outlet end of the backwash air pipe 17 are arranged in the second space 112.

[0025] The tank body 11 has a storage space for containing water, and an activated carbon filler layer 12 is arranged in the storage space to filter the wastewater. The activated carbon filler layer 12 is arranged in the horizontal direction. It can be understood that the peripheral side of the activated carbon filler layer 12 is connected to the side wall of the tank body 11 to ensure the filtering effect, and the wastewater can be purified by passing through the activated carbon filler layer 12. Among them, the activated carbon filler layer 12 is an activated carbon filler with a high specific surface area, which can provide a carrier for the growth of microbial membranes.

[0026] In the present embodiment, the activated carbon filler layer 12 divides the accommodation space into a first space 111 located on the upper side of the activated carbon filler layer 12 and a second space 112 located on the lower side of the activated carbon filler layer 12 .

[0027] The water inlet pipe 13 is used to transport wastewater. By setting the water outlet end of the water inlet pipe 13 in the second space 112, the wastewater is poured into the bottom of the pool body 11 and passes through the activated carbon filler layer 12 to the first space 111 for filtration. The aeration pipe 15 is used to transport aeration. By setting the air outlet end of the aeration pipe 15 in the second space 112, the aeration passes through the lower side of the activated carbon filler layer 12 and then floats upward through the activated carbon filler layer 12 under the action of buoyancy, thereby providing an aerobic environment for the microorganisms on the surface of the activated carbon filler layer 12. The water outlet pipe 14 is used to transport filtered water for recycling. By setting the water inlet end of the water outlet pipe 14 in the first space 111, the clean water can be recycled.

[0028] In actual implementation, wastewater from the ozone buffer tank is transported to the second space 112 at the bottom of the tank body 11 through the water inlet pipe 13. The wastewater flows through the activated carbon filler layer 12 from bottom to top, and organic matter undergoes biochemical reactions with organisms on the filler surface. The activated carbon filler layer 12 can also play a physical filtering role.

[0029] The backwashing air pipe 17 is used to transport backwashing air, and the backwashing water pipe 16 is used to transport backwashing water. By arranging the air outlet end of the backwashing air pipe 17 and the water outlet end of the backwashing water pipe 16 in the second space 112, the backwashing air and the backwashing water can flush and regenerate the activated carbon filler layer 12 from bottom to top; the backwashing drain pipe 18 is used to discharge the sewage generated during the backwashing process. By arranging the water inlet end of the backwashing drain pipe 18 in the first space 111, the sewage generated during the backwashing process can be collected and discharged.

[0030] Among them, the height of the water inlet end of the backwash drain pipe 18 is lower than the height of the water inlet end of the outlet pipe 14, so that the water inlet end of the backwash drain pipe 18 is closer to the activated carbon filler layer 12. Compared with the related technology in which the water inlet end of the backwash drain pipe is flush with the water inlet end of the outlet pipe, the amount of water required during the backwashing process in this embodiment is less, so that the efficiency of discharging sewage is also higher, thereby improving the backwashing efficiency.

[0031] In actual implementation, when the filtration resistance of the activated carbon biofilter 1 or the suspended solids in the effluent water quality exceeds the design requirements, backwashing is performed to restore the treatment capacity and treatment effect of the activated carbon biofilter 1. The backwashing water pipe 16 and the backwashing air pipe 17 perform a program to clean the activated carbon filler layer 12, so that the excess thickened microbial film on the activated carbon filler layer 12 and the detached microbial film and solid matter trapped in the filter layer are discharged from the activated carbon biofilter 1 through the backwashing drain pipe 18, so that the activated carbon biofilter 1 remains unobstructed and unblocked, so as to ensure the mass transfer efficiency of sewage treatment and the normal circulation of water in the filter layer, and the amount of water used is small, and the backwashing efficiency is higher.

[0032] According to the activated carbon biofilter 1 provided in the embodiment of the present application, backwash gas and water are filled into the tank body 11 through the backwash air pipe 17 and the backwash water pipe 16 to backwash the activated carbon filler layer 12, and the backwash drain pipe 18 discharges the sewage generated during the backwashing process. By setting the height of the water inlet end of the backwash drain pipe 18 lower than the height of the water inlet end of the outlet pipe 14 so that the water inlet end of the backwash drain pipe 18 is closer to the activated carbon filler layer 12, the sewage can be discharged at a faster speed, and the water consumption during the backwashing process is reduced, thereby saving water.

[0033] According to some embodiments of the present application, Figure 1 As shown, the backwash drain pipe 18 can be arranged to penetrate the side wall of the pool body 11 , and the backwash drain pipe 18 can be arranged to be inclined upward in a direction away from the pool body 11 .

[0034] By setting a backwash drain pipe 18 to penetrate the side wall of the tank body 11, the setting height of the water inlet end of the backwash drain pipe 18 can be lowered, wherein at least a portion of the backwash drain pipe 18 is inclined, and the inclined portion of the backwash drain pipe 18 is inclined upward from its water inlet end in a direction away from the tank body 11, so as to reduce the probability of the activated carbon being carried away by the flushing water during the sewage discharge process, thereby improving the durability of the activated carbon biofilter 1.

[0035] According to some embodiments of the present application, the distance L between the water inlet end of the backwash drain pipe 18 and the activated carbon filler layer 12 may satisfy:

[0036] 100mm≤L≤250mm.

[0037] In this embodiment, the water inlet end of the backwash drain pipe 18 is arranged close to the upper surface of the activated carbon filler layer 12, so as to reduce the water consumption of backwashing as much as possible and improve the backwashing efficiency while satisfying the construction process.

[0038] Among them, the value range of the spacing L is [100mm, 250mm]. For example, the spacing L can be 100mm, 120mm, 150mm, 180mm, 200mm, 220mm, 250mm or other values ​​between 100mm-250mm, which are not limited here.

[0039] According to some embodiments of the present application, the activated carbon biofilter 1 may further include a gas distributor 20, which may be disposed on the lower side of the activated carbon filler layer 12, and the air inlet end of the gas distributor 20 may be connected to the air outlet end of the aeration pipe 15, and the gas distributor 20 may include a plurality of dispersion ports 201 distributed in a horizontal direction, and the gas distributor 20 may be used to evenly disperse the gas in the aeration pipe 15 to the plurality of dispersion ports 201 for discharge.

[0040] In the present embodiment, by setting up the gas distributor 20, it can be understood that the gas distributor 20 can include a plurality of branch pipelines, each of which is connected to one or more dispersion ports 201, so that the aeration entering the gas distributor 20 is distributed to each dispersion port 201 through the plurality of branch pipelines, so that the aeration transported by the aeration pipe 15 is evenly discharged from the lower side of the activated carbon filler layer 12 through the plurality of dispersion ports 201, so that the activated carbon filler layer 12 at each position can fully contact with the aeration, thereby improving the filtering effect.

[0041] According to some embodiments of the present application, Figure 1 As shown, the upper end of the tank body 11 can be opened, and the water inlet pipe 13, the water outlet pipe 14 and the aeration pipe 15 can all be extended from the upper end of the tank body 11 into the tank body 11.

[0042] In this embodiment, the water inlet pipe 13, the water outlet pipe 14 and the aeration pipe 15 do not pass through the wall of the pool body 11, but extend downward into the pool body 11 through the opening at the upper end of the pool body 11. The construction is simple and does not damage the wall structure of the pool body 11, thereby reducing waterproof construction, construction costs and the risk of water leakage.

[0043] According to some embodiments of the present application, Figure 1 As shown, the activated carbon biofilter 1 may further include a sewage pipe 19 , which may be arranged to penetrate the bottom wall of the tank body 11 , the inlet of the sewage pipe 19 may be located at the lower end of the second space 112 , and a sewage valve 191 may be provided on the sewage pipe 19 .

[0044] In this embodiment, the liquid level in the activated carbon biofilter 1 needs to be lowered during the backwashing process. Before the backwashing begins, the drain valve 191 can be opened to discharge excess liquid through the drain pipe 19. When the tank body 11 is inspected and maintained, water can be discharged through the drain pipe 19 to facilitate the inspection and maintenance of the low position in the tank body 11.

[0045] According to some embodiments of the present application, Figure 1 As shown, the backwash water pipe 16 and the backwash air pipe 17 are both arranged to penetrate the bottom wall of the pool body 11 , the water outlet end of the backwash water pipe 16 can be located at the bottom of the second space 112 , and the air outlet end of the backwash air pipe 17 can be located at the bottom of the second space 112 .

[0046] In this embodiment, the water outlet end of the backwash water pipe 16 and the air outlet end of the backwash air pipe 17 can be arranged at the bottom of the second space 112, that is, the bottom of the pool body 11, and arranged toward the activated carbon filler layer 12, so that the backwash gas and backwash water can backwash the activated carbon filler layer 12 to improve the flushing effect.

[0047] According to some embodiments of the present application, the inner side wall of the cell body 11 may be provided with a support portion extending inwardly in a horizontal direction, and the activated carbon filler layer 12 may be supported on the support portion.

[0048] The support part is arranged in the middle position in the height direction of the tank body 11, so as to separate the first space 111 and the second space 112, and the support part is arranged to support and fix the activated carbon filler layer 12. Exemplarily, the support part can be a flange extending inward from the inner side wall of the tank body 11, and the flange can be arranged in an annular shape, or can be arranged at intervals along the circumference of the tank body 11, and the circumferential side of the activated carbon filler layer 12 is supported on the flange. It can be understood that in this example, the activated carbon filler layer 12 is arranged with a certain structural strength, or a perforated plate is arranged at the lower end of the activated carbon filler layer 12, and the perforated plate is supported on the flange. The support structure is simple and stable, and has little effect on the wastewater filtration efficiency.

[0049] According to some embodiments of the present application, Figure 1 As shown, the water inlet pipe 13 is provided with a water inlet valve 131; and / or, the water outlet pipe 14 is provided with a water outlet valve 141; and / or, the aeration pipe 15 is provided with an aeration valve 151; and / or, the backwash water pipe 16 is provided with a backwash water valve 161; and / or, the backwash air pipe 17 is provided with a backwash air valve 171; and / or, the backwash drain pipe 18 is provided with a backwash drain valve 181.

[0050] The on-off of the water inlet pipe 13 is controlled by setting the water inlet valve 131, the on-off of the water outlet pipe 14 is controlled by setting the water outlet valve 141, the on-off of the aeration pipe 15 is controlled by setting the aeration valve 151, the on-off of the backwash water pipe 16 is controlled by setting the backwash water valve 161, the on-off of the backwash air pipe 17 is controlled by setting the backwash air valve 171, and the on-off of the backwash drain pipe 18 is controlled by setting the backwash drain valve 181. The specific forms of the valves mentioned above are not limited, and they can be ball valves, butterfly valves, gate valves, etc. The driving mode can be a manual valve, and for the convenience of automatic control, it can also be an electric valve, a pneumatic valve, etc.

[0051] According to some embodiments of the present application, Figure 1 As shown, the air inlet end of the aeration pipe 15 is connected to an aeration fan 152 ; and / or, the water inlet end of the backwash water pipe 16 is connected to a backwash water pump 162 ; and / or, the air inlet end of the backwash air pipe 17 is connected to a backwash fan 172 .

[0052] By providing the aeration fan 152, the aeration can be pressurized, the aeration pressure and circulation speed can be increased, and the filtering effect can be improved. By providing the backwash water pump 162 and the backwash fan 172, the backwash water and the backwash gas can be pressurized to improve the backwash effect.

[0053] According to the activated carbon biofilter 1 provided in some embodiments of the present application, the backwashing process of the activated carbon biofilter 1 includes:

[0054] Step 1, shut down the aeration fan 152 and close the aeration valve 151;

[0055] Step 2, close the water supply valve and the water outlet valve 141;

[0056] Step 3, open the backwash drain valve 181 and the sewage valve 191 to discharge the water in the tank body 11.

[0057] Step 4: When the water in the tank body 11 is drained to the water inlet end of the backwash drain pipe 18, close the drain valve 191.

[0058] Step 5, open the backwash air valve 171, start the backwash fan 172, and perform air washing.

[0059] Step 6, open the backwash water valve 161, start the backwash water pump 162, and perform air and water washing.

[0060] Step 7: Close the backwash air valve 171, shut down the backwash fan 172, and perform water rinsing.

[0061] Step 8: Close the backwash water valve 161, shut down the backwash water pump 162, and stop water rinsing.

[0062] Step 9: Close the backwash drain valve 181 to complete the backwash.

[0063] In step 10, the water outlet valve 141, the water inlet valve 131 and the aeration valve 151 are opened in sequence, and the aeration fan 152 is started to put the activated carbon biofilter 1 into use.

[0064] The following table shows the comparison data of backwash efficiency of activated carbon biofilter 1:

[0065] Comparison table of backwash efficiency of activated carbon biofilter

[0066] Compare Projects Before implementation After implementation Time (minutes) 60 25 Water volume (cubic meters) 180 75 Turbidity of effluent after backwashing (NTU) 16 5

[0067] By comparing the test data, it can be found that the backwashing efficiency of the activated carbon biofilter 1 according to the embodiment of the present application is significantly improved, which not only saves a lot of time but also saves a lot of backwash water, improves work efficiency and greatly saves costs and energy consumption.

[0068] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0069] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0070] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0071] In the description of the present application, “plurality” means two or more.

[0072] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0073] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0075] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An activated carbon biofilter, characterized in that: It includes a tank body, an activated carbon filling layer, a water inlet pipe, a water outlet pipe, an aeration pipe, a backwash water pipe, a backwash air pipe, and a backwash drain pipe. The activated carbon filling layer is arranged in the tank body in a horizontal direction to divide the tank body into a first space and a second space from top to bottom. The water inlet end of the water outlet pipe and the water inlet end of the backwash drain pipe are arranged in the first space, and the water outlet end of the water inlet pipe, the air outlet end of the aeration pipe, the water outlet end of the backwash water pipe, and the air outlet end of the backwash air pipe are arranged in the second space; wherein the height of the water inlet end of the backwash drain pipe is lower than the height of the water inlet end of the water outlet pipe.

2. The activated carbon biofilter according to claim 1, characterized in that: The backwashing drainage pipe is arranged to penetrate the side wall of the pool body, and the backwashing drainage pipe is arranged to be inclined upward in a direction away from the pool body.

3. The activated carbon biofilter according to claim 1, characterized in that: The distance L between the water inlet end of the backwash drain pipe and the activated carbon filler layer satisfies: 100mm≤L≤250mm.

4. The activated carbon biofilter according to any one of claims 1 to 3, characterized in that: It also includes a gas distributor, which is arranged on the lower side of the activated carbon filler layer. The air inlet end of the gas distributor is connected to the air outlet end of the aeration pipe. The gas distributor includes a plurality of dispersion ports distributed in a horizontal direction. The gas distributor is used to evenly disperse the gas in the aeration pipe to the plurality of dispersion ports for discharge.

5. The activated carbon biofilter according to any one of claims 1 to 3, characterized in that: The upper end of the pool body is open, and the water inlet pipe, the water outlet pipe and the aeration pipe are all extended from the upper end of the pool body into the pool body.

6. The activated carbon biofilter according to any one of claims 1 to 3, characterized in that: It also includes a sewage pipe, which is arranged to penetrate the bottom wall of the tank body, the inlet of the sewage pipe is located at the lower end of the second space, and a sewage valve is arranged on the sewage pipe.

7. The activated carbon biofilter according to any one of claims 1 to 3, characterized in that: The backwash water pipe and the backwash air pipe are both arranged to penetrate the bottom wall of the pool body, the water outlet end of the backwash water pipe is located at the bottom of the second space, and the air outlet end of the backwash air pipe is located at the bottom of the second space.

8. The activated carbon biofilter according to any one of claims 1 to 3, characterized in that: The inner side wall of the cell body is provided with a support portion extending inwardly in a horizontal direction, and the activated carbon filler layer is supported on the support portion.

9. The activated carbon biofilter according to any one of claims 1 to 3, characterized in that: The water inlet pipe is provided with a water inlet valve; and / or, the water outlet pipe is provided with a water outlet valve; and / or, the aeration pipe is provided with an aeration valve; and / or, the backwash water pipe is provided with a backwash water valve; and / or, the backwash air pipe is provided with a backwash air valve; and / or, the backwash drain pipe is provided with a backwash drain valve.

10. The activated carbon biofilter according to any one of claims 1 to 3, characterized in that: The air inlet end of the aeration pipe is connected to an aeration fan; and / or, the water inlet end of the backwash water pipe is connected to a backwash water pump; and / or, the air inlet end of the backwash air pipe is connected to a backwash fan.

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